Kangertech EVOD Glass clearomizer uses the glass tube instead plastic, which make it healthier. With the same dual coils as Protank 3, aerotank, EVOD 2, T3S'D atomizers, and the same drip tip and glass tube as mini protank 2, EVOD glassomizer produce huge vapor and more safely experience. The bottom filling and bottom heating coils make it more convenient for you to refill and give you a better taste.